ecology & bio environment geography section 2 MCQ Questions & Answers Detailed Explanation

Answer: (d)

An ecosystem is a community of living and nonliving things that work together. It includes soil, atmosphere, heat and light from the sun, water and living organisms.

Answer: (b)

Taiga is a biome characterized by coniferous forests consisting mostly of pines, spruces and larches. It is the world’s largest terrestrial biome.

Answer: (c)

Mangroves are various kinds of trees up to medium height and shrubs that grow in saline coastal sediment habitats in the tropics and subtropics – mainly between latitudes 25° N and 25° S. There are about 80 different species of mangrove trees.

All of these trees grow in areas with low-oxygen soil, where slow-moving waters allow fine sediments to accumulate.

Answer: (c)

Polar climates feature long and dark winter periods with extremely cold temperatures. Rainfall is low, and the deeper soil layers stay frozen all year round.

These harsh conditions combined result in treeless, sparse vegetation, which includes shrubs, lichens and mosses, during the summer months. This typical vegetation linked to polar climates is called tundra.

Answer: (c)

Biome is a large naturally occurring community of flora and fauna adapted to the particular conditions in which they occur. For example, Tundra region.

Answer: (d)

Mercury causes biomagnification problem in the ecosystem.